425. N.W.A, 'Fuck tha Police'

With one song, N.W.A brought the battle between rappers and cops to a new level. On August 1st, 1989, the FBI sent a bulletin to Priority Records, the group's label, denouncing this song. According to the feds, "Fuck tha Police" "encourages violence against, and disrespect for, the law-enforcement officer." The publicity established N.W.A as hip-hop's bad boys.